/**
 * Created by brss on 2018/9/17.
 */
public class Main {

    public static void main(String[] args) {

        Integer[] nums = {-2, 0, 3, -5, 2, -1};

        SegmentTree<Integer> segTree = new SegmentTree<>(nums, (a,b)->a+b);
        //System.out.println(segTree);

        System.out.println(segTree.query(0, 2));
        System.out.println(segTree.query(2, 5));

    }
}
